July 1984 Table of Contents

Features Dry- and Wet-Mix Process Shotcrete

The two basic methods for applying shotcrete are the dry-mix process and the wet-mix process. The term gunite is frequently used when referring to the dry-mix method; other terms such as air-placed concrete, gunned concrete and sprayed concrete have also been used in the past to describe the process. Read more

Features Shotcrete Reduces Cost of Spillway Crest Construction

Constructing the spillway crest for Willow Creek Dam could have been a dangerous and expensive job if conventional concrete placement techniques had been used. Read more

Features Nozzling Dry-Mix Shotcrete

A skilled, knowledgeable nozzleman with properly functioning equipment and suitable materials is the key to good shotcreting. Read more

Features Charts Aid in Design of Horizontal Formwork

Formwork design can be simple and straightforward when the designer understands the fundamental structural requirements of each member making up the forming system. Read more

Features Proposed Field Test for Drying Shrinkage of Concrete

Some of the many variables that affect the cracking of concrete are: materials and design; placing and finishing techniques; temperature and humidity; curing practices; ground conditions; and structural loads. Read more

Features A New System to Contain Hazardous Wastes

A composite liner has been developed for use in impoundments of hazardous wastes. Read more

Features Earth Structures Reinforced with Steel Strips Resist Lateral Pressures

Earth reinforced with steel strips and faced with precast concrete panels has been used worldwide to build retaining walls, sea and river walls, bridge abutments, industrial facilities and earth-sheltered homes. Read more

Features Void Forms Used with Caisson-Supported Foundations to Prevent Heaving in Expansion Soils

Each year in the United States, shrinking or swelling soils inflict more than $2 billion damage on houses, roads, pipelines, and other structures and buildings. Read more

Problem Clinic Shipping Precast Panels

We are expecting to purchase about 150 precast panels, 10 by 20 feet each, from a manufacturer. What stipulations do you think we ought to include in our contract to be sure that they are handled and shipped properly? Read more

Problem Clinic Water—For Sickness or Health

When and why does water change its effect on concrete--from harming it, by too high a water-cement ratio, to helping it during curing? What goes on? Read more

Problem Clinic Bagged Glass Fiber-Reinforced Concrete Materials

An article appeared on pages 250 and 251 of your March 1983 issue concerning uses for glass fiber reinforced concrete. Read more

Problem Clinic Preventing Cracks in Superflat Floors

Is it true that superflat floors are built without transverse joints and that they are expected to crack? Read more

Problem Clinic Constructing Near Blast Sites

Construction of a 5-story building about 100 yards from a working quarry is under consideration. Read more

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